6.24.3 ECMAScript

ECMAScript
was not the first non-Schemey language implemented by Guile, but it was
the first implemented for Guile’s bytecode compiler. The goal was to
support ECMAScript version 3.1, a relatively small language, but the
implementor was completely irresponsible and got distracted by other
things before finishing the standard library, and even some bits of the
syntax. So, ECMAScript does deserve a mention in the manual, but it
doesn’t deserve an endorsement until its implementation is completed,
perhaps by some more responsible hacker.

In the meantime, the charitable user might investigate such invocations
as ,L ecmascript and cat test-suite/tests/ecmascript.test.